Device and method for cooling solid particles

Abstract

A cooling arrangement and system are provided for use in a process of producing brittle particles, and comprising: a first chamber having: a solid particles feed ingress means; a solid particles mixing means; and a solid particles egress means, and a second chamber comprising at least one cooling fluid discharging means, wherein the cooling arrangement is characterized in that there is a low thermal resistance between the first chamber and the second chamber to allow cooling down the solid particles being fed to the first chamber via the solid particles feed ingress means, and wherein the solid particles feed ingress means is operative to introduce solid particles, each having a typical diameter of less than 7 mm.

1 . A cooling arrangement adapted for use in a process of producing brittle particles, and comprising:
 a first chamber having:
 a solid particles feed ingress means; 
 a solid particles mixing means; and 
 a solid particles egress means, and 
   a second chamber comprising at least one cooling fluid discharging means,   wherein the cooling arrangement is characterized in that there is a low thermal resistance between the first chamber and the second chamber to allow cooling down the solid particles being fed to the first chamber via the solid particles feed ingress means, and   wherein the solid particles feed ingress means is operative to introduce solid particles, each having a typical diameter of less than 7 mm.   
     
     
         2 . The cooling arrangement of  claim 1 , wherein said first chamber and said second chamber share a common wall. 
     
     
         3 . The cooling arrangement of  claim 1 , wherein said first chamber is essentially of a conical shape. 
     
     
         4 . The cooling arrangement of  claim 1 , wherein said second chamber comprises a plurality of cooling air discharging means. 
     
     
         5 . The cooling arrangement of  claim 1 , wherein each of the at least one cooling fluid discharging means is adapted to receive said cooling fluid from an expanding device. 
     
     
         6 . The cooling arrangement of  claim 1 , wherein said solid particles are indirectly cooled by said cooling fluid to a temperature that is in the range of from about −70° C. to about −110° C. 
     
     
         7 . A system for use in a process of recovering material contained in used tires, wherein the system comprises:
 one or more compressing devices adapted to compress a cooling fluid;   one or more expanders operative to receive the pressurized cooling fluid and expand it so that its temperature is lowered to a level required for operating a cooling arrangement of said system;   a cooling arrangement which comprises:   a first chamber having:
 a solid particles feed ingress means; 
 a solid particles mixing means; and 
 a solid particles egress means, and 
   a second chamber comprising at least one cooling fluid discharging means,   wherein the cooling arrangement is characterized in that there is a low thermal resistance between the first chamber and the second chamber to allow cooling down the solid particles being fed to the first chamber via the solid particles feed ingress means, by the expanded cooling fluid, and   wherein the solid particles feed ingress means is operative to introduce solid particles, each having a typical diameter of less than 7 mm.   
     
     
         8 . The system according to  claim 7 , wherein said first chamber is substantially surrounded by said second chamber. 
     
     
         9 . The system according to  claim 7 , wherein said first chamber has essentially a conical shape, and is completely surrounded by the second chamber. 
     
     
         10 . The system according to  claim 7 , wherein said first system further comprises recycling means operative to enable return of the cooling fluid leaving the chamber to the one or more compressing devices. 
     
     
         11 . The system according to  claim 7 , wherein said cooling fluid is air and the second chamber comprises a plurality of cooling air discharging means.